Multiple NIC's. Which is used for pinging?

Ping will use the card that is on the network you are pinging.
Or the default route for a network that isn't defined.
If you are trying to put 3 cards on the same network, then it is usualy
the first card used, but that isn't garenteed as it isn't supported, you
only use one network card per network, or you are useing loadbalancing.
You tell the system with network routes that you set up for each card.
Robert


On Tue, 30 Aug 2005 18:09:44 +0000, Jezabel wrote:

> I just set up a Fedora Core 4 box with 3 network cards.
> All three are configured with different IP's.
>
> When I try to ping somewhere in my network it always uses the same card to
> do the pinging.
>
> Similarly, although I have only one card plugged into the network, I am
> unable to talk to the web server, ping the machine, etc from the outside
> until I disable the other two cards.
>
> How do I tell the system which card I want to handle which address ranges
> (inbound and outbound)?
>
>
> Thanks
>
> -Jez

I just set up a Fedora Core 4 box with 3 network cards.
All three are configured with different IP's.

When I try to ping somewhere in my network it always uses the same card to
do the pinging.

Similarly, although I have only one card plugged into the network, I am
unable to talk to the web server, ping the machine, etc from the outside
until I disable the other two cards.

How do I tell the system which card I want to handle which address ranges
(inbound and outbound)?


Thanks

-Jez

> I just set up a Fedora Core 4 box with 3 network cards.
> All three are configured with different IP's.
>
> When I try to ping somewhere in my network it always uses the same card to
> do the pinging.
>
> Similarly, although I have only one card plugged into the network, I am
> unable to talk to the web server, ping the machine, etc from the outside
> until I disable the other two cards.
>
> How do I tell the system which card I want to handle which address ranges
> (inbound and outbound)?
>
>
> Thanks
>
> -Jez

Hi,

i´m not sure but my first idea is "defaultroute". Do a netstat -r or a
route print to verify. In the routing-table is the interface that is
used for this target, too.

ruediger